L.B.
Hello Cyndie,
I do not know of JRA except that it is an auto-immune disorder and many scietist and health care professionals believe that it is caused by the lack of vitamins and minerals. So if you can get him on a supplement that will can add it into his diet it may help.
My personal experience is to get a liquid supplement that the body can absorb better. (most pills can only be absorbed by 10-20% and are h*** o* the body)
if you would like some of my suggestions I would love to help.
Hope he can start feeling better permantly
lq